Harrow



May 14, 1935. E. LANCASTER HARROW Filed Aug. 15, 1934 4 Sheets-Sheet l i 4 w a Z.

y 1935. E. LANCASTER I 2,001,254

HARROW Filed Aug. 15, 1954 4 Sheets-Sheet 2 2 3 v x @u r 2 Q) N K I R e 2' k Attorney May 14, 1935.

E. LANCASTER HARROW Filed Aug. 15. 1934 4 Sheets-Sheet 3 Attorney May 14, 1935. E. 1.. LANCASTER HARROW Filed Au 15, 1954 4 Sheets-Sheet 4 Invenior Zaauasiez minnow Application August 15, 1934, Serial No. 739,988 .1 Claim. (Claw- 216) This invention relates'to harrows and an object 25 housed within thehubs of the gears-2 For of the invention is to provide a harrow that may shifting the clutch members '25 into andout of be used successfully on bedded or flat ground or engagement with the 'clutch teeth 24, there are for crop cultivation; g provided rods' 26 that are slidable insockets pro- M The invention, together with its objects and vided in the shafts 5, andjthe clutch members advantages, will be best understood from a study 25 are positively; engaged with therods 28 of the following description taken in connection through the medium of pins 21 that operate in UNITED srATEs PATENTQOF-FIICE,

with the accompanying drawings wherein: suitable slots provided 'therefor'in-the-shafts |5 Figure 1 is a top planview ofthe harrowemas will be clear from a study ofFigurestand 6.. 1O bodying the features of the'present invention. On their outer ends, the rods 26 are provided Figure 2 is a detail sectional view through the with 'collars 28 with which are engaged shifting harrow. forks 29 pivoted to the side members low of the Figures 3 and 4 are detail views taken subframe as at30. a f 1 I stantially on the lines 3-3 and 44, respectively, For rocking the forks 29 there are provided M v of Figure 1. manipulating rods-or handles 3|, operating in 15 Figure 5 isan elevational view of an arm and suitably provided guides'32 and at oneendhavrack segment associated therewith. ing loop'portions 33 that are suitably engaged Figure 6 is a detail view illustrating certain with the upper ends of the forks 29 as will be features of construction to be hereinafter more clear from a study of Figures 1'and 4p fully referred to. From the above, it will'be apparent that when 30 Figure '7 is a-detaif view taken substantially on the forks 29' are rocked to's'lide the rods" 26 outthe line 1-! of Figure 2. wardly with respect to the shafts 5, the clutch Figure 8'is a detail view taken substantially on members '25 are "moved intoengagement with v the line 8-8 of Figure 2. the clutch teeth 24thus"providin @fldrive con- 25 Figure 9 is a detail-view taken at right angles nection between the shafts I5 and the gears 2|.

to Figure 8. Drive from the shafts I5 is thereby'transmitted Figure 10 is a detail view taken substantially through the gearing2|land2l to the shaft|9 for on the line |8|8 of Figure 9. I revolving the latter] I I Referring to the drawings by reference nu- For and lowering the shaft 9 and merals,.it will beseenthat the harrow comprises parts associated therewith (and hereinafter 0 a suitable frame l0 having a draft tongue more fully referred to); there are provided on Suitably mounted on the frame is a seat l2 for the arms rack segments- 34 with which mesh the operator. worms 35. The worms 35 are provided on the Provided on'the sides I00, of the frame ID are ends of shafts 36 journaled'in-suitable bearing 35 bearings l3 in which are bushings f|4 having brackets 31 provided therefor on the sidesflld journaled therein shafts) |5 to which are suitably of the frame I0. For rotating the shafts'36there secured the hubs of traction wheels I 6 (seeFigisprovided a main shaft38 journaled in suitable ure 4). In this manner the frameis suitably bearings 39 also suitably provided on the frame supported by the traction wheels l6. l0, and at the ends thereof the shaft 38 is in 40 Rockably confined on theibushings |4 between driving engagement with the shafts 36 through 40 the bearings l3 and the hubs of. the wheels |6 the medium of suitable gearing arranged in gear arearmsl'l which at their free ends, are procases 40; t v p t vided with openings! that accommodate a shaft For operating the shaft 38 there is'provided a l9. For driving the shaft I9 from the traction shaft 4| journaledin suitable bearing "brackets wheels Hi there are provided on the ends of the 42 and shaft 4| is in driving engagement with 45 shaft l9 pinion gears 2|] which, as clearly shown the shaft 38 through the medium of suitable in Figure 3, are in constant mesh with large gearing 43. For rotating the shaft 4| the same ring gears 2| suitably mounted on the shafts I5 is provided with a hand wheel 44 and for releasbetween the arms l1 and the hubs of the wheels ably securing the hand wheel against accidental 6. The pinions 20 and gears 2| are suitably rotation, there is provided a suitably mounted 50 us d in Casings 22. pivoted locking member 45 that is adapted to For placing the gears 2| in driving engagement engage with the wheel in a manner clearly with the shafts IS the hubs of the gears 2| are suggested in Figures 1 and 2.

provided with internal clutch teeth 24 with which Manifestly by rotating the wheel 44 drive is are cooperable teeth provided on clutch members transmitted from the shaft 4| to the shaft 38 and from the shaft 38 to the shafts 3B, and by reason of the worms 35 engaging the segments 34, arms I! will be caused to rotate about the bushings [4 as axes to raise or lower the shaft I9 as may be found desirable.

Mounted on the shaft I9 is a harrow assembly which, in the present instance consists of a pair of spaced spider members 46 that support therebetween a circular series of rods 4'lfltheends of which are rotatably received infsuitable;,oper;1- ings provided in the rims of themembers 4B. The members 46 have their hubs'secured to the shaft l9 in any suitable manner to rotate said shaft.

spaced harrow fingers 48 amd'each harrow finger- 48 is secured to its rod 41 through the medium of a suitably apertured U-"shapedclamp 49 provided with a screw 50 that serves to secure the clamp 49 in position and the finger 48secu'red at the desired angle ,between the rod-41 and the inner endiof the screw 50 ;(see.Figure;!7)

From the'above itlwill be seen that the fingers 48 are so mounted that,; in the event one or more ofzthe fingers come into engagement with an obstruction, the associated rod 41 will, rotate in the proper direction toMrelease-the finger and thus -prevent breaking thereof.

Toreturmthe rod 431 tolits normal position upon movement of a finger, or fingers 4B outof engagement with such an obstruction as above alluded to, each rod 41 is provided at one end thereof with a suitably shaped plate 52- that-is secured to the-rod 'fl in anysuitable manner suchas by a set screwor the like '52, Rotative movement of theimember 52; and associated rod 41, islimited through the mediujrn'oflaheaded stud 53 provided on an adjacent spoke 46a of; the spider and operating in an arcuat groove 54 provided in the plate 51,-; Also mountedon :the same spoke of the spideris: a bracket member 55 toewhich is pivoted one corner ofa substantially triangularplate 56 asiat '51. At theapex thereof, the plate 56- is, pivoted.as at;58 to. one end of a bifurcated link 55, tthe legs of which straddle the plate 52 e e The link 55 is connected with-the; plate= 5l through the medium of a bolt.59-;that =is engaged in openings provided in the legs of the link 55 and which operates in the slot 54 oftheplateas will be clear from astudy of Figuresld and lq. As shown inthe last named;figure" 10), the bolt 59 isprovided on one end with a nut 60 have ing a reduced cylindrical portionkfor accommor datingthe opening \inone of the; legs of the link 55 while at the head end thereof the other legof the link 55 is arranged betweenthe head ofthe boltand a suitable shoulder :6! provided'thereon.

Preferably, and as shown, the plate 51 eop'ppsite; sides thereof and at the edges of the" 10 .54 is suitably roughened to prevent undue slippage of the bolt 59. 4 o, For yieldably retaining the parts in the positions shown in Figures 8 and 9, thereis'provided with a suitable spring device which includes a shank member 62 that has portions thereof straddling the plate 56 and pivoted to the bracket 55 as at B3.

Slidable on the shank member 62 is a plate 64 that I th'e'selected notch 65.

. For limiting the movement of the link 55 the latter is provided with an adjustment screw 68 ;;that has one end adapted to abut the adjacent Carried by each rod 4'! is a series of relatively spoke 460 as shown in Figure 9.

Should oneof ,the fingers 48 strike an obstruction to causethe associated rod 41 to rotate, in a clockwise'direction as viewed from Figure 10, the plate .5L will rotate ina corresponding direction causing, a downwardpush on the link 55 which will result I in the plate 55 being caused alsoto'rotate in a clockwise direction. After the finger has passed over. the obstruction, spring fit will act on the plate 56 return the parts to thenormal position ,or the position shown in'Figure 10.

If desirable, and. asshown, a suitable shield fi'l may be provided for the narrow finger assembly and, the shield istransversely curved, and, extends longitudinally lof saidassemblm andis properly 1 V shaft, spiders mounted on said shaft, a circular series of rods rotatably supported by said spiders, a series. of relatively spaced harrow fingers mounted on each rod to'rotate therewith, and. yieldable devices connected with. the ro'ds'to vnormallyurge the rods torotate in one direction, said rodsl being rotatable in a reverse direction upon impact of a'harrow finger with an obstruction, each of I said devices including a member secured to a rod forro't'ation therewith andprovided with .anareuate,slot,;a"bracket 'me'mber fixed relative to the. rod,; a plate pivoted to the bracket member, aflink pivoted to the plate, a bolt carried by said link and operating in said slot, and a springdevice engaged with the bracket and said v v 60 plate yieldably retainingthe plate in a predetermined positions v t t a UGE LANC R: 

